通过应用程序读取WebSphere环境变量

因为特殊原因，需要把某些与应用部署环境相关的信息配置在Was Server上，但是在Java应用中能否取到WebSphere的环境变量信息呢？搜索资料后，找到方法，解决代码如下：

public class WasVariableUtil {
	public static String loadVariable(String variableString) throws Throwable {
		String result = null;
		AdminService adminService = AdminServiceFactory.getAdminService();
		ObjectName adminObjectQuery = new ObjectName("WebSphere:*,type=AdminOperations");
		Set objectNames = adminService.queryNames(adminObjectQuery, null);
		if (!objectNames.isEmpty()) {
			ObjectName adminObjectName = (ObjectName) objectNames.iterator().next();
			String operationName = "expandVariable";
			String signature[] = { String.class.getName() };
			String params[] = { variableString };
			Object retVal = adminService.invoke(adminObjectName, operationName, params, signature);
			result = String.valueOf(retVal);
		}
		return result;
	}

	public static void main(String[] args) {

		String result = null;
		try {
			result = WasVariableUtil.loadVariable("${WAS_INSTALL_ROOT}");
		} catch (Throwable e) {
			e.printStackTrace();
			result = "Default Value";
		}
		System.out.println(result);
	}
}

以上为代码实现。此外，还依赖Was Client的jar，名称为：com.ibm.ws.webservices.thinclient_6.1.0.jar，在WebSphere的安装目录/opt/IBM/WebSphere/AppServer/runtimes（Linux环境）下可以找到此Jar包